Ключевые слова: 11, 2017, barcelona, catalan, catalonia, catalunya, claim, crowd, crowded, day, demonstration, diada, estelada, europe, european, flag, horizontal, independence, independencia, march, nacional, national, parade, partakers, people, persons, protest, rally, red, referendum, riot, rioters, secession, senyera, separatism, separatist, september, spain, spanish, via, vote, yellow,